Nausea (feeling the need to vomit) and vomiting are common treatment side effects and can lead to loss of appetite, weight loss, fatigue, and dehydration. Nausea and vomiting can be caused by chemotherapy and certain types of radiation (such as brain radiation). It may also be the result of the spread of cancer to the brain or to the abdomen.

Practical tips to prevent and manage nausea and vomiting

  • Eat bland foods. Avoid greasy, salty, spicy, and heavily seasoned foods.
  • Do not lie down after eating a meal. Sit upright for two hours after eating.
  • Drink fluids throughout the day, especially if you are vomiting, because you may become dehydrated more quickly.

In addition to these tips and the tips above in the section on loss of appetite, there are medications that your doctor can give to control nausea and vomiting.